Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b61d757d32e0cfea9ed1f24558cda2050e0bb6a7b917a841c6d4c9bec32ae2d' 
  AND token = 'O9Dk0xAFMrsnj/pbpmDsriaxssE1TqgdF7a98mQ17mA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}